The Graph Shows the Decay Curves of Four Radioactive Elements

question 39

Multiple Choice

The graph shows the decay curves of four radioactive elements. The half-life is the same for elements

• A) 1 and 2
• B) 3 and 4
• C) 1 and 4
• D) 2 and 3
• E) 1 and 3

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Definitions:

Tissue Culture

A technique of growing cells, tissues, or organs in a controlled environment outside of their natural environment.

Protoplasts

Plant, bacterial, or fungal cells that have had their cell wall removed, exposing the cell membrane and internal contents.

"Eyes"

Sensory organs in animals and humans that are specialized for vision, detecting light and allowing for sight.

Protoplasts

Cells that have had their cell wall removed, exposing the plasma membrane and allowing for study or manipulation of cellular processes.